More than a million people in the UK work in the gig economy - casual, often irregular work usually found through online platforms - and many have been fighting for more rights from their employers.

The Independent Workers Union of Great Britain says Mr Boxer is now being blacklisted.

In a statement, Addison Lee said: "Addison Lee is committed to fair and respectful treatment of all its contractors. Mr Boxer has never made a formal complaint to us. We are now reviewing the matter and it would be wrong to comment further until that review is complete."